<?php

/**
 * JPGraph v4.0.3
 */

namespace lemon\JpGraph\Graph;

use lemon\JpGraph\Text;

/**
 * @class RadarAxis
 * // Description: Implements axis for the radar graph
 */
class RadarAxis extends AxisPrototype
{
	public $title;
	private $title_color = 'navy';
	private $len		 = 0;

	public function __construct($img, $aScale, $color = [0, 0, 0]){
		parent::__construct($img, $aScale, $color);
		$this->len   = $img->plotheight;
		$this->title = new Text\Text();
		$this->title->SetFont(FF_FONT1, FS_BOLD);
		$this->color = [0, 0, 0];
	}

	// Stroke the axis
	// $pos	= Vertical position of axis
	// $aAxisAngle = Axis angle
	// $grid   = Returns an array with positions used to draw the grid
	// $lf   = Label flag, TRUE if the axis should have labels
	public function Stroke($pos, $aAxisAngle, &$grid, $title, $lf){
		$this->img->SetColor($this->color);

		// Determine end points for the axis
		$x = round($this->scale->world_abs_size * cos($aAxisAngle) + $this->scale->scale_abs[0]);
		$y = round($pos - $this->scale->world_abs_size * sin($aAxisAngle));

		// Draw axis
		$this->img->SetColor($this->color);
		$this->img->SetLineWeight($this->weight);
		if (!$this->hide) {
			$this->img->Line($this->scale->scale_abs[0], $pos, $x, $y);
		}

		$this->scale->ticks->Stroke($this->img, $grid, $pos, $aAxisAngle, $this->scale, $majpos, $majlabel);
		$ncolor = 0;
		if (isset($this->ticks_label_colors)) {
			$ncolor = safe_count($this->ticks_label_colors);
		}

		// Draw labels
		if ($lf && !$this->hide) {
			$this->img->SetFont($this->font_family, $this->font_style, $this->font_size);
			$this->img->SetTextAlign('left', 'top');
			$this->img->SetColor($this->label_color);

			// majpos contains (x,y) coordinates for labels
			if (!$this->hide_labels) {
				$n = floor(safe_count($majpos) / 2);
				for ($i = 0; $i < $n; ++$i) {
					// Set specific label color if specified
					if ($ncolor > 0) {
						$this->img->SetColor($this->ticks_label_colors[$i % $ncolor]);
					}

					if ($this->ticks_label != null && isset($this->ticks_label[$i])) {
						$this->img->StrokeText($majpos[$i * 2], $majpos[$i * 2 + 1], $this->ticks_label[$i]);
					} else {
						$this->img->StrokeText($majpos[$i * 2], $majpos[$i * 2 + 1], $majlabel[$i]);
					}
				}
			}
		}
		$this->_StrokeAxisTitle($pos, $aAxisAngle, $title);
	}

	public function _StrokeAxisTitle($pos, $aAxisAngle, $title){
		$this->title->Set($title);
		$marg = 6 + $this->title->margin;
		$xt   = round(($this->scale->world_abs_size + $marg) * cos($aAxisAngle) + $this->scale->scale_abs[0]);
		$yt   = round($pos - ($this->scale->world_abs_size + $marg) * sin($aAxisAngle));

		// Position the axis title.
		// dx, dy is the offset from the top left corner of the bounding box that sorrounds the text
		// that intersects with the extension of the corresponding axis. The code looks a little
		// bit messy but this is really the only way of having a reasonable position of the
		// axis titles.
		if ($this->title->iWordwrap > 0) {
			$title = wordwrap($title, $this->title->iWordwrap, "\n");
		}

		$h = $this->img->GetTextHeight($title) * 1.2;
		$w = $this->img->GetTextWidth($title) * 1.2;

		while ($aAxisAngle > 2 * M_PI) {
			$aAxisAngle -= 2 * M_PI;
		}

		// Around 3 a'clock
		if ($aAxisAngle >= 7 * M_PI / 4 || $aAxisAngle <= M_PI / 4) {
			$dx = -0.15;
		}
		// Small trimming to make the dist to the axis more even

		// Around 12 a'clock
		if ($aAxisAngle >= M_PI / 4 && $aAxisAngle <= 3 * M_PI / 4) {
			$dx = ($aAxisAngle - M_PI / 4) * 2 / M_PI;
		}

		// Around 9 a'clock
		if ($aAxisAngle >= 3 * M_PI / 4 && $aAxisAngle <= 5 * M_PI / 4) {
			$dx = 1;
		}

		// Around 6 a'clock
		if ($aAxisAngle >= 5 * M_PI / 4 && $aAxisAngle <= 7 * M_PI / 4) {
			$dx = (1 - ($aAxisAngle - M_PI * 5 / 4) * 2 / M_PI);
		}

		if ($aAxisAngle >= 7 * M_PI / 4) {
			$dy = (($aAxisAngle - M_PI) - 3 * M_PI / 4) * 2 / M_PI;
		}

		if ($aAxisAngle <= M_PI / 12) {
			$dy = (0.5 - $aAxisAngle * 2 / M_PI);
		}

		if ($aAxisAngle <= M_PI / 4 && $aAxisAngle > M_PI / 12) {
			$dy = (1 - $aAxisAngle * 2 / M_PI);
		}

		if ($aAxisAngle >= M_PI / 4 && $aAxisAngle <= 3 * M_PI / 4) {
			$dy = 1;
		}

		if ($aAxisAngle >= 3 * M_PI / 4 && $aAxisAngle <= 5 * M_PI / 4) {
			$dy = (1 - ($aAxisAngle - 3 * M_PI / 4) * 2 / M_PI);
		}

		if ($aAxisAngle >= 5 * M_PI / 4 && $aAxisAngle <= 7 * M_PI / 4) {
			$dy = 0;
		}

		if (!$this->hide) {
			$this->title->Stroke($this->img, $xt - $dx * $w, $yt - $dy * $h, $title);
		}
	}
} // @class
